II. During Operation Trouble
A) Engine fails.
B) Engine suddenly s tarts
knocking heavily
C) Som e C yli n d ers f ai l to
operate.
D) Engine emits dense black
smoke.
E) Engine output decreases.
F) Engine overheating.
Caution : Immediately put
engine Back to idling
position and stop it after
some minutes !
Cause
1. No fuel in tank
2. Fuel filter is dirty
3. Leaking fuel pipe.
4. Fuel feed pump does not
supply fuel.
5. Dirty or damaged injection
nozzles
Injection nozzle has got stuck.
One or more nozzles are not
working.
Injection pump does not function
properly.
Broken valve spring at intake or
exhaust valve.
Nozzles are damaged or the nozzle
needle got stuck.
1. Fuel injection pump is not
working properly.
2. Incorrect fuel injection timing.
3. Air filter is dirty.
Fuel filter choked.
1. Lack of water in radiator.
2. Leaking pipes.
3. Cooling system is dirty.
4. Thermostat is damaged.
5. Water pump is damaged.
6. V-belt tension is not in order.
7. Cylinder head gasket leaks
(can be notice d b y g as
bubbles in the cooling water)
Remedy
Refill tank. After filling a tank which
has been completely emptied. at
first vent the fuel system.
Clean.
Firmly tighten connections.
Replace. Have the old pump
checked at MICO dealer.
Replace nozzles : have old nozzles
checked or cleaned by MICO
dealer.
Remove load from the engine.
Repeatedly shift from idling to full
load for a short time. If the knocking
does not stop, have the entire fuel
system cleaned as soon
as possible.
Dismount and check nozzles at
MICO dealer’s workshop.
Get it checked a MICO Dealer’s
workshop.
Replace it.
Check. if necessary, change and
clean them.
Have this r epaired at MI C O
authorised service station only.
Check and reset the fuel timing.
Clean.
Replace fuel filter elements & clean
fuel filter bowls.
Slowly add cooling water only while
the engine is running.
Retighten pipe connection, if
necessary Replace gaskets.
Clean
Remove. Replace by new over as
soon as possible.
Have it repaired at CDSS Dealer’s
workshop.
Check
Check gasket. When fastening
cylinder head again pay attention
to the tightening sequence.
Workshop Manual
S3.8 Engine
A030K288 (Issue 2)
01-2010
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